I don't knap but lots of guys around here that do use rhyolite because it is our local knapping rock. Rhyolite arrowheads and blades are very tough and hold up better than many other types of stone. The greenish rhyolite is finer grain and although as tough is easier to work I think. James Parker(huntworthyproductions) has worked tons(literally) of rhyolite and is as good of a knapper as I have ever seen. James lives up near Boone.

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Make the most of all that comes and the least of all that goes!TGMM Family of the Bow

Bud, I'm planning on going to the Powder Creek shoot. It's been a few years since I've been there. Usually I would have a primitive skills weekend at my place but I had to cancel this year. I always waited until Linda scheduled their shoot before I set my dates. My event was originally scheduled for this coming weekend but like I said above I had to cancel.

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Make the most of all that comes and the least of all that goes!TGMM Family of the Bow

Several years ago we had two guys at a local club to teach knapping. One of them knapped a rhyolite knife and the other one from obsidian. After completing their task, the guy with the rhyolite knife looked at the other guy with a "I dare you" look, and then threw the knife into a tree. The guy with the obsidian knife looked like he was about to be trapped, but couldn't back away. He threw his knife and the obsidian broke into several pieces.

Obsidian can be knapped into the sharpest edge in the world, but it is not tough like rhyolite. I have about a thousand pounds and it will last me more than 1 lifetime. (It's also tough to process.)